Cylindrical battery aluminum shell structure detection tool

Abstract

The present application relates to battery aluminum shell detection technical field, and disclose a kind of cylindrical battery aluminum shell structure detection tool, including tool seat and electric guide rail;Tool seat is equipped with loading piece and lifting piece, and lifting piece is driven to approach or away from loading piece by electric guide rail, loading piece is equipped with cylindrical aluminum shell and can drive it to rotate, lifting piece is equipped with loading seat, loading seat is equipped with first distance sensor for detecting the height of cylindrical aluminum shell;The end of loading seat is equipped with elastic detection piece for detecting the periphery of cylindrical aluminum shell.The present application detects shell height by first distance sensor non-contact, identifies stop frame multiple loading or missing, detects shell periphery deformation using elastic detection piece in cooperation with third distance sensor, combined with second detection camera visual verification, realizes deformation detection and strength detection integration by state switching, integrates first detection camera and first pressure sensor to form multiple error-proof mechanism, realizes assembly quality real-time monitoring.

Description

Technical Field

[0001] This invention relates to the field of battery aluminum shell testing technology, and in particular to a testing fixture for cylindrical battery aluminum shell structures. Background Technology

[0002] As an electrochemical energy storage unit, a cylindrical battery typically includes core components such as a cylindrical aluminum shell, a core, a stop frame, and a cover plate. The stop frame plays a role in bottom insulation and axial restraint during the cell assembly process. In the assembly process, the stop frame is usually installed into the cylindrical aluminum shell first, and then the core is installed into the shell, the current collector is welded, and the sealing process is completed in sequence.

[0003] However, the assembly of components into the aluminum casing of batteries is usually done manually in an assembly line style. Operators need to continuously insert stoppers into the aluminum casings on the assembly line. During this process, due to human operation or inattention, abnormal situations such as multiple stoppers being mistakenly installed in a single aluminum casing or no stoppers being installed can easily occur. These abnormalities are difficult to identify directly through external visual inspection or conventional electrical performance testing in subsequent processes. Once they flow into the later process, they will lead to quality hazards such as insulation failure between the core and the casing, out-of-tolerance axial fit dimensions, or internal short circuits, ultimately affecting the safety of cylindrical batteries. Existing assembly lines lack inspection fixtures that can detect whether there are multiple or missing stoppers in the cylindrical aluminum casings, making it impossible to effectively monitor and prevent errors in the process quality of critical assembly processes.

[0004] To address the aforementioned issues, this application proposes a testing fixture for a cylindrical battery aluminum shell structure. Summary of the Invention

[0005] This invention proposes a testing fixture for cylindrical battery aluminum shell structures, which solves the problem that in related technologies, when manually assembling the stop frame of cylindrical battery aluminum shells, it is easy to over-assemble or omit the parts. Existing production lines lack effective testing fixtures, which leads to the inability to detect potential quality problems in a timely manner and affects battery safety.

[0006] This invention proposes a testing fixture for a cylindrical battery aluminum shell structure, comprising a fixture base and an electric guide rail;

[0007] The tooling base is equipped with a loading component and a lifting component. The lifting component is driven by an electric guide rail to move closer to or away from the loading component. A cylindrical aluminum shell is fitted on the loading component and can be rotated. A loading seat is installed on the lifting component, and a first distance sensor for detecting the height of the cylindrical aluminum shell is installed on the loading seat.

[0008] The end of the loading seat is equipped with an elastic detection element for detecting the outer periphery of the cylindrical aluminum shell;

[0009] The elastic detection element has a first state and a second state. In the first state, the elastic detection element is in a natural posture. The electric guide rail and the lifting component move to make the elastic detection element on the loading seat come into contact with the outer periphery of the cylindrical aluminum shell. The loading component drives the cylindrical aluminum shell to rotate. If there is a defect on its outer periphery, the elastic detection element will elastically vibrate. In the second state, the elastic detection element is in a locked posture. The electric guide rail drives the lifting component to make the elastic detection element on the loading seat apply pressure to the outer periphery of the cylindrical aluminum shell to perform strength testing.

[0010] As a further optimization of the present invention, the elastic detection element includes a fixed column, an opening is provided in the loading seat, a loading channel communicating with the opening is provided at the end of the loading seat, the fixed column is installed in the loading channel, a fixed shaft located in the opening is fixed at the end of the fixed column, a rod-type elastic part is installed on the fixed column that passes through the fixed shaft and extends into the opening, and a dome head located at the end of the loading seat is installed at one end of the rod-type elastic part.

[0011] As a further optimization of the present invention, the rod-type elastic part includes a connecting rod that slides through the fixed column and the fixed shaft and extends into the opening. A dome head is installed at one end of the connecting rod, and an end head located inside the opening is installed at the other end of the connecting rod. A spring is sleeved on the connecting rod, and the two ends of the spring are respectively connected to the fixed shaft and the end head. A locking part for locking the connecting rod is provided on the fixed shaft. A third distance sensor facing the end head is installed on the inner wall of the opening.

[0012] As a further optimization of the present invention, the locking part includes a bolt, and the fixed shaft is threaded with a bolt for locking the connecting rod.

[0013] As a further optimization of the present invention, a second pressure sensor is connected between the dome head and the connecting rod, and a notch is provided at the end of the loading seat, and a second detection camera is installed in the notch.

[0014] As a further optimization of the present invention, the loading component includes a motor, the bottom of the tooling base is equipped with the motor, the output end of the motor is connected to a loading column located above the tooling base, and a limit head is installed on the top of the loading column.

[0015] As a further optimization of the present invention, the top of the limiting head is provided with an installation groove, a first detection camera is installed in the installation groove, and a first pressure sensor is installed between the limiting head and the loading column.

[0016] As a further optimization of the present invention, the lifting component includes a cylinder, the electric guide rail is mounted on the tooling seat and arranged towards the loading column, the driving end of the electric guide rail is connected to a fixing block, the cylinder is mounted on the fixing block, the driving end of the cylinder is connected to a loading head, the loading seat is placed on the loading head, the loading seat has an opening, the loading head is fixed with a screw passing through the opening, and the screw is threaded with a nut that is pressed against the top surface of the loading seat.

[0017] As a further optimization of the present invention, a second distance sensor is installed on the tooling base below the first distance sensor, and the second distance sensor is used to detect the bottom of the cylindrical aluminum shell.

[0018] As a further optimization of the present invention, an alarm and a controller are installed on the tooling base. The electric guide rail, the second distance sensor, the alarm, the first pressure sensor, the first detection camera, the motor, the cylinder, the first distance sensor, the third distance sensor, the second detection camera, and the second pressure sensor are all communicatively connected to the controller.

[0019] The above-described technical solution of the present invention has the following beneficial technical effects:

[0020] 1. During the process of inserting the stop bracket into the cylindrical aluminum shell on the assembly line, the cylindrical aluminum shell can be placed on the loading component of the tooling base. Then, the lifting component is driven by the electric guide rail to move the loading base closer to the cylindrical aluminum shell, so that the first distance sensor on the loading base is placed above the cylindrical aluminum shell. The lifting component raises and lowers the first distance sensor on the loading base to a preset height. Then, the overall height of the cylindrical aluminum shell is detected by the first distance sensor. If there are multiple stop brackets in the cylindrical aluminum shell, its overall height will be higher than the preset height. If there are no stop brackets in the cylindrical aluminum shell, its overall height will be lower than the preset height. This allows for timely detection of excess or missing stop brackets in the cylindrical aluminum shell. The above non-contact detection of the overall height of the cylindrical aluminum shell by the first distance sensor can quickly identify the excess or missing stop brackets, realize real-time quality monitoring of the assembly process, effectively prevent defective products from flowing into subsequent processes, reduce safety hazards caused by insulation failure or dimensional deviation, and improve the assembly quality and production efficiency of cylindrical batteries.

[0021] 2. During the insertion of the stop bracket into the cylindrical aluminum shell, if the pressing force is too large, it will cause deformation of the outer periphery of the cylindrical aluminum shell at the position where the stop bracket is placed. After the overall height of the cylindrical aluminum shell is measured, the lifting component can be driven away from the cylindrical aluminum shell via the electric guide rail. This allows the elastic detection component on the loading seat to contact the outer periphery of the cylindrical aluminum shell under the drive of the lifting component. Subsequently, the lifting component drives the loading seat to move the elastic detection component downward, so that the elastic detection component contacts the outer periphery of the cylindrical aluminum shell. The contact position is directly opposite the stop bracket inside the cylindrical aluminum shell. The elastic detection component can switch between two position states. In its natural posture, it can perform elastic shaking. The cylindrical aluminum shell is rotated by the loading component. If the outer circumference of the cylindrical aluminum shell deforms, the elastic detection component will vibrate elastically. The displacement of the elastic detection component can be detected by the third distance sensor on the loading seat, which can promptly remind the staff that there is deformation on the outer circumference of the cylindrical aluminum shell. The above-mentioned use of the elastic vibration characteristics of the elastic detection component combined with the displacement detection of the third distance sensor can detect deformation defects on the outer circumference of the cylindrical aluminum shell, realize early warning of shell deformation problems in the pressing process, facilitate timely adjustment of the pressing process, prevent poor core assembly and internal short circuit risk caused by shell deformation, and improve the structural integrity and safety reliability of the product.

[0022] 3. When the loading component drives the cylindrical aluminum shell to rotate, and the elastic detection component detects whether there is deformation on its outer periphery, the second detection camera at the end of the loading base can be used to observe the outer periphery of the cylindrical aluminum shell by video. The observation is compared with the detection by the elastic detection component to further improve the accuracy of the detection. The above-mentioned visual detection by the second detection camera and mechanical detection by the elastic detection component form a complementary verification mechanism, realizing multi-faceted defect identification, effectively reducing the false judgment rate and missed detection rate of a single detection method, improving the accuracy of deformation detection of the outer periphery of the cylindrical aluminum shell, and providing a more sufficient basis for quality judgment.

[0023] 4. When no deformation occurs on the outer periphery of the loading component, the elastic detection component can be switched to the locked state. Then, the lifting component is driven by the electric guide rail to apply a certain pressure to the outer periphery of the cylindrical aluminum shell at the position where the stop bracket is placed, and the strength of the outer periphery is tested. The applied pressure can be monitored by the second pressure sensor in the elastic detection component. After the strength test is completed, the locked state of the elastic detection component can be released. The loading component drives the cylindrical aluminum shell to rotate, and the outer periphery is tested again by the elastic detection component. The second detection camera can be used to observe whether there are any defects on the outer periphery. The above design realizes the integration of deformation detection and strength detection through the state switching of the elastic detection component. The second pressure sensor is used to monitor the local strength of the shell, which not only verifies whether the structural strength of the cylindrical aluminum shell after press-fitting meets the requirements, but also discovers potential hidden cracks or material defects. It realizes the quantitative detection of the local strength of the cylindrical aluminum shell, and the deformation is retested after unlocking to ensure that the cylindrical aluminum shell meets the strength requirements without any new damage.

[0024] 5. When the cylindrical aluminum shell is assembled on the loading component for inspection, the first inspection camera in the loading component can detect whether there are any defects inside the cylindrical aluminum shell during the assembly process. After the cylindrical aluminum shell is placed on the loading component, the first pressure sensor in the loading component can detect the overall weight of the cylindrical aluminum shell. If it exceeds the preset weight, it means that too many stop frames have been placed inside the cylindrical aluminum shell. If it is less than the preset weight, it means that no stop frames have been placed. The above design forms a dual error prevention mechanism by placing the first inspection camera in the loading process for internal defect pre-inspection and combining it with the weight detection of the first pressure sensor. It can detect workpieces with inherent defects or abnormal stop frame assembly at the beginning of assembly, improve the inspection coverage and defect detection rate, and effectively ensure the product consistency and safety of cylindrical batteries. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a cylindrical battery aluminum shell structure testing fixture proposed in this invention.

[0026] Figure 2 This is a front view of a cylindrical battery aluminum shell structure testing fixture proposed in this invention;

[0027] Figure 3 This is a schematic diagram of the bottom structure of a cylindrical battery aluminum shell structure testing fixture proposed in this invention;

[0028] Figure 4 This is a schematic diagram of the cooperation structure between the loading seat and the elastic detection element in this invention;

[0029] Figure 5 This is a schematic diagram of the elastic detection element in this invention;

[0030] Figure 6 This is a schematic diagram of the dome head structure in this invention;

[0031] Figure 7 This is a schematic diagram of the planar structure of the lifting component and the loading seat in this invention;

[0032] Figure 8 This is a schematic diagram of the disassembled structure of the loading column and the limiting head in this invention.

[0033] Reference numerals: 1. Tooling base; 101. Electric guide rail; 1011. Fixing block; 102. Second distance sensor; 103. Alarm; 104. Controller; 2. Loading component; 201. Cylindrical aluminum shell; 21. Motor; 22. Loading column; 221. First pressure sensor; 23. Limit head; 231. First detection camera; 3. Lifting component; 31. Cylinder; 32. Loading head; 321. Screw; 322. Nut; 4. Loading base; 41. First distance sensor; 42. Third distance sensor; 43. Second detection camera; 5. Elastic detection component; 51. Fixing column; 511. Fixing shaft; 512. Bolt; 52. Rod-type elastic part; 521. Connecting rod; 522. End; 523. Spring; 53. Dome head; 531. Second pressure sensor. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0035] like Figure 1-8 As shown, the present invention proposes a cylindrical battery aluminum shell structure testing fixture, which includes a fixture base 1 and an electric guide rail 101.

[0036] The tooling base 1 is equipped with a loading component 2 and a lifting component 3. The lifting component 3 is driven by the electric guide rail 101 to move closer to or away from the loading component 2. The loading component 2 is fitted with a cylindrical aluminum shell 201 and can be driven to rotate. The lifting component 3 is equipped with a loading seat 4. The loading seat 4 is equipped with a first distance sensor 41 for detecting the height of the cylindrical aluminum shell 201.

[0037] An elastic detection element 5 for detecting the outer periphery of the cylindrical aluminum shell 201 is installed at the end of the loading seat 4;

[0038] The elastic detection element 5 has a first state and a second state. In the first state, the elastic detection element 5 is in a natural posture. The electric guide rail 101 and the lifting element 3 drive the elastic detection element 5 on the loading seat 4 to come into contact with the outer periphery of the cylindrical aluminum shell 201. The loading element 2 drives the cylindrical aluminum shell 201 to rotate. If there is a defect on its outer periphery, the elastic detection element 5 will vibrate elastically. In the second state, the elastic detection element 5 is in a locked posture. The electric guide rail 101 drives the lifting element 3 to drive the elastic detection element 5 on the loading seat 4 to apply pressure to the outer periphery of the cylindrical aluminum shell 201 for strength testing.

[0039] During the process of inserting the stop bracket into the cylindrical aluminum shell 201 on the production line, the cylindrical aluminum shell 201 can be mounted on the loading component 2 of the tooling seat 1. Then, the lifting component 3 is driven by the electric guide rail 101 to move the loading seat 4 closer to the cylindrical aluminum shell 201, so that the first distance sensor 41 on the loading seat 4 is placed above the cylindrical aluminum shell 201. The lifting component 3 raises and lowers the first distance sensor 41 on the loading seat 4 to a preset height. Then, the first distance sensor 41 detects the overall height of the cylindrical aluminum shell 201. If there are multiple stop brackets inside the cylindrical aluminum shell 201, its overall height will be higher than the preset height. If there are no stop brackets inside the cylindrical aluminum shell 201, its overall height will be lower than the preset height. By quickly measuring its height in a non-contact manner, it is possible to determine whether there are too many or too few stop brackets inside the cylindrical aluminum shell 201, which effectively improves the detection efficiency.

[0040] If the pressing force is too great during the insertion of the stop bracket into the cylindrical aluminum shell 201, it will cause deformation of the outer periphery of the cylindrical aluminum shell 201 at the position where the stop bracket is placed. The present invention is designed with a structure that can detect whether the outer periphery of the cylindrical aluminum shell 201 is deformed. The specific principle is as follows:

[0041] After the overall height of the cylindrical aluminum shell 201 is measured, the lifting component 3 can be driven away from the cylindrical aluminum shell 201 via the electric guide rail 101. This allows the elastic detection component 5 on the loading seat 4 to contact the outer periphery of the cylindrical aluminum shell 201 under the drive of the lifting component 3. Subsequently, the lifting component 3 drives the loading seat 4 to move the elastic detection component 5 downwards, causing the elastic detection component 5 to contact the outer periphery of the cylindrical aluminum shell 201. The contact position is directly opposite to the stop frame inside the cylindrical aluminum shell 201. The elastic detection component 5 can switch between two position states. In its natural posture, it can elastically vibrate. The loading component 2 drives the cylindrical aluminum shell 201 to rotate. If the outer periphery of the cylindrical aluminum shell 201... Defects such as deformation, protrusions, or depressions will exert irregular forces on the elastic detection element 5, causing it to vibrate elastically, thereby quickly identifying defects on the outer peripheral surface. After the outer peripheral inspection of the cylindrical aluminum shell 201 is completed, if no defects are detected, the structural strength of its outer peripheral surface can be tested. At this time, the elastic detection element 5 is switched to the locked state, and the electric guide rail 101 drives the lifting element 3 to apply a preset pressure to the outer peripheral surface of the cylindrical aluminum shell 201, completing the strength test of the local structure of the cylindrical aluminum shell 201. This design realizes the integrated integration of height detection, peripheral defect detection, and strength detection, without the need to change multiple tooling, thus improving the detection efficiency.

[0042] It should be noted that after the strength test of the cylindrical aluminum shell 201 is completed, the locking state of the elastic detection element 5 can be released. The cylindrical aluminum shell 201 is rotated by the loading element 2, and its outer periphery is tested again by the elastic detection element 5. The above design realizes the integration of deformation detection and strength detection through the state switching of the elastic detection element 5, realizes the quantitative detection of the local strength of the cylindrical aluminum shell 201, and re-measures the deformation after unlocking to ensure that the cylindrical aluminum shell 201 meets the strength requirements without any new damage.

[0043] In this embodiment, the elastic detection element 5 includes a fixed post 51, an opening is provided in the loading seat 4, and a loading channel communicating with the opening is provided at the end of the loading seat 4. The fixed post 51 is installed in the loading channel, and a fixed shaft 511 located in the opening is fixed at the end of the fixed post 51. A rod-type elastic part 52 is installed on the fixed post 51, passing through the fixed shaft 511 and extending into the opening. A dome head 53 located at the end of the loading seat 4 is installed at one end of the rod-type elastic part 52.

[0044] When it is necessary to detect whether there is deformation on the outer periphery of the cylindrical aluminum shell 201, the electric guide rail 101 and the lifting component 3 work to drive the elastic detection component 5 on the loading seat 4 to move closer to the position of the cylindrical aluminum shell 201 that needs to be detected, so that the dome head 53 on the rod elastic part 52 abuts against the outer periphery of the cylindrical aluminum shell 201. Then the loading component 2 drives the cylindrical aluminum shell 201 to rotate. If there is a defect on its outer periphery, the dome head 53 will cause the rod elastic part 52 to vibrate due to uneven contact, thereby detecting the defect on the outer periphery of the cylindrical aluminum shell 201 and improving the sensitivity of defect detection.

[0045] It should be noted that in actual use, the end of the dome head 53 can be made of ball bearings to reduce friction.

[0046] In this embodiment, the rod-type elastic part 52 includes a connecting rod 521. The connecting rod 521 slides through the fixed post 51 and the fixed shaft 511 and extends into the opening. A dome head 53 is installed at one end of the connecting rod 521. An end head 522 located in the opening is installed at the other end of the connecting rod 521. A spring 523 is sleeved on the connecting rod 521, and the two ends of the spring 523 are respectively connected to the fixed shaft 511 and the end head 522. A locking part for locking the connecting rod 521 is provided on the fixed shaft 511. A third distance sensor 42 is installed on the inner wall of the opening and faces the end head 522.

[0047] When the elastic detection component 5 is in its natural position for peripheral defect detection, the dome head 53 contacts the outer periphery of the cylindrical aluminum shell 201, and the loading component 2 drives the aluminum shell to rotate. If there are defects such as deformation or protrusion on the outer periphery of the aluminum shell, a lateral force will be generated on the dome head 53. This force is transmitted to the connecting rod 521 and pushes the end head 522 to move, thereby stretching the spring 523 and causing the connecting rod 521 to vibrate elastically. When the end head 522 moves, the third distance sensor 42 can determine the defect status of the outer periphery of the cylindrical aluminum shell 201 by detecting the displacement change of the end head 522, thus improving the detection accuracy. When the defect area leaves the contact position, the elastic potential energy of the spring 523 will drive the connecting rod 521 to quickly reset and return to the initial detection position, ensuring continuous detection of the outer periphery of the aluminum shell.

[0048] When it is necessary to switch to the locked posture to carry out strength testing, the locking part locks the connecting rod 521, restricting its sliding and swinging, keeping the connecting rod 521 in a rigid state, so that the dome head 53 fixed to the connecting rod 521 can stably apply pressure to the outer periphery of the cylindrical aluminum shell 201 for strength testing.

[0049] After the local strength test of the cylindrical aluminum shell 201 is completed, the locking state of the connecting rod 521 can be released. Then, the cylindrical aluminum shell 201 is rotated by the loading component 2. The outer circumference of the cylindrical aluminum shell 201 can be re-inspected by the elastic testing component 5 to ensure that the cylindrical aluminum shell 201 meets the strength requirements and has no new damage.

[0050] In this embodiment, the locking part includes a bolt 512, and a bolt 512 for locking the connecting rod 521 is threaded onto the fixing shaft 511;

[0051] When the elastic testing element 5 needs to be switched to the locked position for strength testing, the connecting rod 521 is locked by tightening the bolt 512. At this time, the elastic testing element 5 can apply stable pressure to the outer periphery of the cylindrical aluminum shell 201 to complete the strength testing operation. When it is necessary to switch back to the first natural position for peripheral defect testing, the bolt 512 is loosened to release the lock on the connecting rod 521. The connecting rod 521 can restore its elastic movement capability under the action of the spring 523. The above can quickly realize the switching between the two working states of the elastic testing element 5, shorten the switching time of the testing process, and improve the overall testing efficiency.

[0052] In this embodiment, a second pressure sensor 531 is connected between the dome head 53 and the connecting rod 521, and a notch is opened at the end of the loading seat 4, and a second detection camera 43 is installed in the notch;

[0053] When the dome head 53 in the elastic testing component 5 contacts the outer periphery of the cylindrical aluminum shell 201, the second pressure sensor 531 can detect the reaction force of the cylindrical aluminum shell 201 on the dome head 53 in real time. During defect detection, the fluctuation of pressure data can help determine the size and hardness of the defects on the outer periphery of the cylindrical aluminum shell 201. During strength testing, the pressure value applied to the outer periphery of the cylindrical aluminum shell 201 can be monitored to ensure that the pressure meets the testing standards and avoid secondary damage to the aluminum shell due to excessive pressure or inaccurate strength testing results due to insufficient pressure.

[0054] The second detection camera 43 can perform real-time video recording and image acquisition on the outer periphery of the aluminum shell and transmit the visual image information to the control terminal. This design realizes the dual cooperation of pressure detection and visual detection. The second pressure sensor 531 provides quantified pressure data, and the second detection camera 43 provides intuitive visual images. The two verify each other, effectively reducing the false judgment rate and missed detection rate of a single detection method. At the same time, the detection process can be recorded in images, which is convenient for subsequent quality traceability and problem analysis.

[0055] It should be noted that after the strength test of the outer periphery of the cylindrical aluminum shell 201 is completed, during the re-inspection, the second inspection camera 43 can be used to identify whether there are any defects on its outer periphery, so as to further ensure that the strength requirements are met and there is no new damage.

[0056] In this embodiment, the loading component 2 includes a motor 21. The bottom of the tooling base 1 is equipped with the motor 21. The output end of the motor 21 is connected to a loading column 22 located above the tooling base 1. A limit head 23 is installed on the top of the loading column 22.

[0057] When inspecting the cylindrical aluminum shell 201, it can be placed on the loading column 22 and the limiting head 23, so that the limiting head 23 supports the stop frame inside the cylindrical aluminum shell 201. Then the overall height of the cylindrical aluminum shell 201 can be detected by the first distance sensor 41.

[0058] When it is necessary to detect whether there is deformation on the outer periphery of the cylindrical aluminum shell 201, the loading column 22 and the limiting head 23 can be driven by the motor 21 to rotate the cylindrical aluminum shell 201, so that the elastic detection component 5, the second detection camera 43 and other detection components can perform all-round detection on the outer periphery of the aluminum shell, avoiding the occurrence of detection blind spots.

[0059] It should be noted that during strength testing, the loading column 22 can be driven by motor 21 to rotate the cylindrical aluminum shell 201 and switch different testing points. During strength testing, motor 21 does not work and the cylindrical aluminum shell 201 is fixed.

[0060] In this embodiment, the top of the limiting head 23 is provided with an installation groove, in which a first detection camera 231 is installed, and a first pressure sensor 221 is installed between the limiting head 23 and the loading column 22.

[0061] After the cylindrical aluminum shell 201 is mounted on the loading column 22, the first detection camera 231 on the limit head 23 can perform real-time image acquisition on the inside of the cylindrical aluminum shell 201 to detect whether there are inherent defects such as stains, scratches, and deformation inside the cylindrical aluminum shell 201, thereby achieving pre-inspection of the quality of the cylindrical aluminum shell 201 and preventing unqualified cylindrical aluminum shells 201 from flowing into subsequent assembly processes.

[0062] The first pressure sensor 221 between the limiting head 23 and the loading column 22 can detect the pressure value it receives in real time. Since the cylindrical aluminum shell 201 is mounted on the loading column 22, its own weight will be transmitted to the first pressure sensor 221 through the limiting head 23. And the weight of the stop frame is a fixed value. Therefore, the first pressure sensor 221 can judge the assembly status of the stop frame inside the cylindrical aluminum shell 201 by detecting the total weight. If the weight exceeds the preset value, it means that an extra stop frame is installed. If the weight is lower than the preset value, it means that a stop frame is missing. This design realizes the pre-positioning of internal defect detection of the cylindrical aluminum shell 201 and stop frame assembly weight detection. The first detection camera 231 detects the internal quality from a visual perspective, and the first pressure sensor 221 judges the assembly status of the stop frame from a weight perspective, forming a dual error prevention mechanism, further improving the defect detection rate and ensuring the battery assembly quality from the source.

[0063] In this embodiment, the lifting component 3 includes a cylinder 31, an electric guide rail 101 is mounted on the tooling seat 1 and arranged towards the loading column 22, the driving end of the electric guide rail 101 is connected to a fixing block 1011, the cylinder 31 is mounted on the fixing block 1011, the driving end of the cylinder 31 is connected to a loading head 32, the loading seat 4 is placed on the loading head 32, the loading seat 4 has an opening, the loading head 32 is fixed with a screw 321 passing through the opening, and the screw 321 is threaded with a nut 322 that is pressed against the top surface of the loading seat 4;

[0064] The electric guide rail 101 can drive the fixed block 1011 to move horizontally, thereby driving the cylinder 31, loading head 32 and loading seat 4 installed on the fixed block 1011 to achieve horizontal position adjustment, and complete the horizontal alignment of the detection component and the cylindrical aluminum shell 201.

[0065] The cylinder 31 can drive the loading head 32 and the loading seat 4 to move vertically up and down, thereby adjusting the vertical position between the first distance sensor 41, the elastic detection element 5 and other detection components and the cylindrical aluminum shell 201, and controlling the detection height of the detection components.

[0066] After the loading seat 4 is placed on the loading head 32, the screw 321 on the loading head 32 passes through the opening of the loading seat 4. The nut 322 is threaded onto the screw 321 and tightened, which can press the loading seat 4 onto the loading head 32, realizing the quick fixing and disassembly of the loading seat 4, which is convenient for the maintenance and replacement of the test components.

[0067] In this embodiment, a second distance sensor 102 located below the first distance sensor 41 is installed on the tooling base 1, and the second distance sensor 102 is used to detect the bottom of the cylindrical aluminum shell 201.

[0068] The second distance sensor 102 and the first distance sensor 41 form a vertically corresponding detection layout. The first distance sensor 41 detects the upper height data of the cylindrical aluminum shell 201 from the top, and the second distance sensor 102 detects the bottom position data of the aluminum shell from the bottom. The detection data of the two sensors work together to more accurately calibrate and detect the overall height of the cylindrical aluminum shell 201. At the same time, it can detect whether the cylindrical aluminum shell 201 is tilted or not, avoiding height detection errors caused by tilting of the cylindrical aluminum shell 201. This design, through vertically coordinated detection, makes up for the limitations of single sensor detection, improves the accuracy of height detection, and can also assist in detecting the installation posture of the cylindrical aluminum shell 201, making the judgment results of the over-installation or under-installation of the stop bracket more accurate.

[0069] In this embodiment, an alarm 103 and a controller 104 are installed on the tooling base 1. The electric guide rail 101, the second distance sensor 102, the alarm 103, the first pressure sensor 221, the first detection camera 231, the motor 21, the cylinder 31, the first distance sensor 41, the third distance sensor 42, the second detection camera 43, and the second pressure sensor 531 are all communicatively connected to the controller 104.

[0070] Each sensor and corresponding detection camera transmits the collected detection data, such as distance, pressure, and images, to the controller 104 in real time. The controller 104 analyzes and processes the data, compares it with preset standard data, and determines whether the tested cylindrical aluminum shell 201 is qualified. Simultaneously, based on the detection process and data results, the controller 104 sends control commands to the actuators such as the electric guide rail 101, motor 21, and cylinder 31 to achieve coordinated operation of each component, such as controlling the moving distance of the electric guide rail 101, the rotational speed of the motor 21, and the lifting height of the cylinder 31. When the controller 104 determines... When a defective cylindrical aluminum shell 201 is detected, a trigger command is immediately sent to the alarm 103. The alarm 103 then emits an audible and visual alarm, promptly reminding staff to handle the defective product. This design enables intelligent operation of the inspection tooling. The centralized control of the controller 104 allows for more precise coordination of various components and a smoother inspection process, improving inspection efficiency. The real-time alarm of the alarm 103 enables timely identification and sorting of defective products, preventing them from flowing into subsequent processes. At the same time, all inspection data can be stored and traced through the controller 104, facilitating quality control during the production process.

[0071] The specific working principle of this invention is as follows:

[0072] The cylindrical aluminum shell 201 to be tested is mounted on the loading column 22, and the limiting head 23 on it limits its movement. During the mounting process, the first detection camera 231 on the limiting head 23 acquires images of the inside of the cylindrical aluminum shell 201 to detect whether there are inherent defects such as scratches, stains, or deformation inside. After the loading is completed, the first pressure sensor 221 between the limiting head 23 and the loading column 22 detects the overall weight of the cylindrical aluminum shell 201 and compares it with the preset standard weight to preliminarily determine whether the stop frame inside the aluminum shell is overloaded or missing. The detection data is transmitted to the controller 104 in real time.

[0073] The controller 104 sends a command to drive the electric guide rail 101 to move the fixed block 1011 horizontally, so that the loading seat 4 on the lifting component 3 is aligned with the top of the cylindrical aluminum shell 201. Then, the cylinder 31 drives the loading head 32 to move the loading seat 4 vertically up and down, adjusting the first distance sensor 41 on the loading seat 4 to the preset detection height to detect the height of the top of the cylindrical aluminum shell 201. At the same time, the second distance sensor 102 on the tooling seat 1 detects the bottom position of the cylindrical aluminum shell 201. The two sets of distance data are transmitted to the controller 104 for comprehensive analysis to determine whether the overall height of the cylindrical aluminum shell 201 meets the standard and to further verify whether the stop bracket is over-installed or missing. If the height or weight data is abnormal, the controller 104 triggers the alarm 103 to issue an audible and visual alarm.

[0074] If the height and weight tests are successful, the controller 104 drives the electric guide rail 101 and cylinder 31 to adjust the position of the loading seat 4 so that the dome head 53 of the elastic detection element 5 at the end of the loading seat 4 abuts against the position of the outer periphery of the cylindrical aluminum shell 201 facing the stop frame. At this time, the elastic detection element 5 is in its natural position, the bolt 512 is in a loose state, and the connecting rod 521 can move elastically under the action of the spring 523. Then the controller 104 starts the motor 21, and the motor 21 drives the loading column 22 and the cylindrical aluminum shell 201 evenly. If there is a deformation defect on the outer periphery of the cylindrical aluminum shell 201, it will push the dome head 53 to cause the connecting rod 521 to vibrate elastically, and the end head 522 will move accordingly. The third distance sensor 42 in the opening detects the displacement change of the end head 522 and transmits it to the controller 104. At the same time, the second detection camera 43 on the loading seat 4 performs real-time imaging of the outer periphery of the cylindrical aluminum shell 201. The visual image and displacement data are mutually verified to identify the deformation defect on the outer periphery. If a defect is detected, the controller 104 triggers the alarm 103 to sound an alarm.

[0075] If the peripheral deformation test is qualified, the controller 104 issues a command to manually tighten the bolt 512 on the fixed shaft 511 and lock the connecting rod 521, so that the elastic detection element 5 switches to the locked posture. Then the controller 104 drives the electric guide rail 101 to drive the lifting element 3 to approach the cylindrical aluminum shell 201, so that the dome head 53 of the elastic detection element 5 applies pressure to the position of the stop frame on the outer periphery of the aluminum shell. The second pressure sensor 531 between the dome head 53 and the connecting rod 521 detects the pressure value in real time and transmits it to the controller 104 to ensure that the pressure meets the strength test standard, complete the strength test, and determine whether the aluminum shell has hidden cracks, insufficient material strength, or other problems.

[0076] After the strength test is completed, the bolt 512 is loosened to release the lock on the connecting rod 521. The controller 104 restarts the motor 21 to drive the cylindrical aluminum shell 201 to rotate. The elastic testing component 5 and the second testing camera 43 perform a second retest on the outer circumference of the cylindrical aluminum shell 201 to confirm that there are no new deformation defects after the strength test. If all test items are qualified, the staff removes the cylindrical aluminum shell 201 from the loading column 22 and flows into the subsequent assembly process. If any test item is unqualified, the alarm 103 will continue to sound. The staff sorts and processes the unqualified products.

[0077] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A testing fixture for a cylindrical battery aluminum shell structure, characterized in that, Includes tooling base (1) and electric guide rail (101); The tooling base (1) is equipped with a loading component (2) and a lifting component (3). The lifting component (3) is driven by the electric guide rail (101) to move closer to or away from the loading component (2). The loading component (2) is fitted with a cylindrical aluminum shell (201) and can rotate it. The lifting component (3) is equipped with a loading seat (4). The loading seat (4) is equipped with a first distance sensor (41) for detecting the height of the cylindrical aluminum shell (201). The end of the loading seat (4) is equipped with an elastic detection element (5) for detecting the outer periphery of the cylindrical aluminum shell (201); The elastic detection element (5) has a first state and a second state. In the first state, the elastic detection element (5) is in a natural posture. The electric guide rail (101) and the lifting element (3) move to drive the elastic detection element (5) on the loading seat (4) to contact the outer periphery of the cylindrical aluminum shell (201). The loading element (2) drives the cylindrical aluminum shell (201) to rotate. If there is a defect on its outer periphery, the elastic detection element (5) will vibrate elastically. In the second state, the elastic detection element (5) is in a locked posture. The electric guide rail (101) drives the lifting element (3) to drive the elastic detection element (5) on the loading seat (4) to apply pressure to the outer periphery of the cylindrical aluminum shell (201) for strength testing.

2. The testing fixture for a cylindrical battery aluminum shell structure according to claim 1, characterized in that, The elastic detection element (5) includes a fixed column (51), an opening is provided in the loading seat (4), a loading channel communicating with the opening is provided at the end of the loading seat (4), the fixed column (51) is installed in the loading channel, a fixed shaft (511) located in the opening is fixed at the end of the fixed column (51), a rod-type elastic part (52) is installed on the fixed column (51) that passes through the fixed shaft (511) and extends into the opening, and a dome head (53) located at the end of the loading seat (4) is installed at one end of the rod-type elastic part (52).

3. The cylindrical battery aluminum shell structure testing fixture according to claim 2, characterized in that, The rod-type elastic part (52) includes a connecting rod (521), which slides through the fixed post (51) and the fixed shaft (511) and extends into the opening. The dome head (53) is installed at one end of the connecting rod (521), and the other end of the connecting rod (521) is installed with an end head (522) located in the opening. A spring (523) is sleeved on the connecting rod (521), and the two ends of the spring (523) are respectively connected to the fixed shaft (511) and the end head (522). A locking part for locking the connecting rod (521) is provided on the fixed shaft (511), and a third distance sensor (42) is installed on the inner wall of the opening facing the end head (522).

4. The testing fixture for a cylindrical battery aluminum shell structure according to claim 3, characterized in that, The locking part includes a bolt (512), and the fixed shaft (511) is threaded with a bolt (512) for locking the connecting rod (521).

5. The testing fixture for a cylindrical battery aluminum shell structure according to claim 3, characterized in that, A second pressure sensor (531) is connected between the dome head (53) and the connecting rod (521). The loading seat (4) has a notch at its end, and a second detection camera (43) is installed in the notch.

6. The testing fixture for a cylindrical battery aluminum shell structure according to claim 5, characterized in that, The loading component (2) includes a motor (21), the bottom of the tooling base (1) is equipped with the motor (21), the output end of the motor (21) is connected to a loading column (22) located above the tooling base (1), and a limit head (23) is installed on the top of the loading column (22).

7. The testing fixture for a cylindrical battery aluminum shell structure according to claim 6, characterized in that, The top of the limiting head (23) is provided with an installation groove, in which a first detection camera (231) is installed, and a first pressure sensor (221) is installed between the limiting head (23) and the loading column (22).

8. The testing fixture for a cylindrical battery aluminum shell structure according to claim 7, characterized in that, The lifting component (3) includes a cylinder (31), the electric guide rail (101) is mounted on the tooling seat (1) and arranged towards the loading column (22), the driving end of the electric guide rail (101) is connected to a fixing block (1011), the cylinder (31) is mounted on the fixing block (1011), the driving end of the cylinder (31) is connected to a loading head (32), the loading seat (4) is placed on the loading head (32), the loading seat (4) has an opening, the loading head (32) is fixed with a screw (321) passing through the opening, and the screw (321) is threaded with a nut (322) that is pressed against the top surface of the loading seat (4).

9. The testing fixture for a cylindrical battery aluminum shell structure according to claim 8, characterized in that, The tooling base (1) is equipped with a second distance sensor (102) located below the first distance sensor (41), and the second distance sensor (102) is used to detect the bottom of the cylindrical aluminum shell (201).

10. A testing fixture for a cylindrical battery aluminum shell structure according to claim 9, characterized in that, An alarm (103) and a controller (104) are installed on the tooling base (1). The electric guide rail (101), the second distance sensor (102), the alarm (103), the first pressure sensor (221), the first detection camera (231), the motor (21), the cylinder (31), the first distance sensor (41), the third distance sensor (42), the second detection camera (43), and the second pressure sensor (531) are all connected to the controller (104) in communication.

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